名词
中文翻译：失败按钮
同义词：
['fail-safe switch', 'safety switch', 'fail-safe mechanism']
例句：
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1. The engineer found the failure button and turned it off immediately.
工程师发现故障按钮并立即关闭了它。
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2.The system has a fail-safe switch that automatically shuts down if something goes wrong.
这个系统有一个安全开关，如果发生故障会自动关闭。
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3. The pilot used the fail-safe switch to avoid an emergency landing.
飞行员使用了安全开关以避免紧急着陆。